Clean up PluginGroup and related code.

chrome/renderer/render_view.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_RENDERER_RENDER_VIEW_H_
 #define CHROME_RENDERER_RENDER_VIEW_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 981 matching lines @@
 
   // Create a new Pepper plugin.
   WebKit::WebPlugin* CreatePepperPlugin(WebKit::WebFrame* frame,
                                         const WebKit::WebPluginParams& params,
                                         const FilePath& path,
                                         pepper::PluginModule* pepper_module);
 
   WebKit::WebPlugin* CreateOutdatedPluginPlaceholder(
       WebKit::WebFrame* frame,
       const WebKit::WebPluginParams& params,
-      PluginGroup* group);
+      const PluginGroup& group);
 
   // Sends an IPC notification that the specified content type was blocked.
   // If the content type requires it, |resource_identifier| names the specific
   // resource that was blocked (the plugin path in the case of plugins),
   // otherwise it's the empty string.
   void DidBlockContentType(ContentSettingsType settings_type,
                            const std::string& resource_identifier);
 
   // This callback is triggered when DownloadImage completes, either
   // succesfully or with a failure. See DownloadImage for more details.
@@ skipping 454 matching lines @@
   // ADDING NEW DATA? Please see if it fits appropriately in one of the above
   // sections rather than throwing it randomly at the end. If you're adding a
   // bunch of stuff, you should probably create a helper class and put your
   // data and methods on that to avoid bloating RenderView more.
   // ---------------------------------------------------------------------------
 
   DISALLOW_COPY_AND_ASSIGN(RenderView);
 };
 
 #endif  // CHROME_RENDERER_RENDER_VIEW_H_